const equals = (a, b) => {
if (a === b) return true;
if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();
if (!a || !b || (typeof a != 'object' && typeof b !== 'object')) return a === b;
if (a === null || a === undefined || b === null || b === undefined) return false;
if (a.prototype !== b.prototype) return false;
let keys = Object.keys(a);
if (keys.length !== Object.keys(b).length) return false;
return keys.every(k => equals(a[k], b[k]));
};
module.exports = equals